FFmpeg: libavformat/img2.c Source File

00001 /*
00002  * Image format
00003  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
00004  * Copyright (c) 2004 Michael Niedermayer
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include "libavutil/intreadwrite.h"
00024 #include "libavutil/avstring.h"
00025 #include "avformat.h"
00026 #include <strings.h>
00027 
00028 typedef struct {
00029     int img_first;
00030     int img_last;
00031     int img_number;
00032     int img_count;
00033     int is_pipe;
00034     char path[1024];
00035 } VideoData;
00036 
00037 typedef struct {
00038     enum CodecID id;
00039     const char *str;
00040 } IdStrMap;
00041 
00042 static const IdStrMap img_tags[] = {
00043     { CODEC_ID_MJPEG     , "jpeg"},
00044     { CODEC_ID_MJPEG     , "jpg"},
00045     { CODEC_ID_LJPEG     , "ljpg"},
00046     { CODEC_ID_PNG       , "png"},
00047     { CODEC_ID_PNG       , "mng"},
00048     { CODEC_ID_PPM       , "ppm"},
00049     { CODEC_ID_PPM       , "pnm"},
00050     { CODEC_ID_PGM       , "pgm"},
00051     { CODEC_ID_PGMYUV    , "pgmyuv"},
00052     { CODEC_ID_PBM       , "pbm"},
00053     { CODEC_ID_PAM       , "pam"},
00054     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
00055     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
00056     { CODEC_ID_MPEG4     , "mpg4-img"},
00057     { CODEC_ID_FFV1      , "ffv1-img"},
00058     { CODEC_ID_RAWVIDEO  , "y"},
00059     { CODEC_ID_BMP       , "bmp"},
00060     { CODEC_ID_GIF       , "gif"},
00061     { CODEC_ID_TARGA     , "tga"},
00062     { CODEC_ID_TIFF      , "tiff"},
00063     { CODEC_ID_TIFF      , "tif"},
00064     { CODEC_ID_SGI       , "sgi"},
00065     { CODEC_ID_PTX       , "ptx"},
00066     { CODEC_ID_PCX       , "pcx"},
00067     { CODEC_ID_SUNRAST   , "sun"},
00068     { CODEC_ID_SUNRAST   , "ras"},
00069     { CODEC_ID_SUNRAST   , "rs"},
00070     { CODEC_ID_SUNRAST   , "im1"},
00071     { CODEC_ID_SUNRAST   , "im8"},
00072     { CODEC_ID_SUNRAST   , "im24"},
00073     { CODEC_ID_SUNRAST   , "sunras"},
00074     { CODEC_ID_JPEG2000  , "jp2"},
00075     { CODEC_ID_NONE      , NULL}
00076 };
00077 
00078 static const int sizes[][2] = {
00079     { 640, 480 },
00080     { 720, 480 },
00081     { 720, 576 },
00082     { 352, 288 },
00083     { 352, 240 },
00084     { 160, 128 },
00085     { 512, 384 },
00086     { 640, 352 },
00087     { 640, 240 },
00088 };
00089 
00090 static int infer_size(int *width_ptr, int *height_ptr, int size)
00091 {
00092     int i;
00093 
00094     for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
00095         if ((sizes[i][0] * sizes[i][1]) == size) {
00096             *width_ptr = sizes[i][0];
00097             *height_ptr = sizes[i][1];
00098             return 0;
00099         }
00100     }
00101     return -1;
00102 }
00103 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
00104 {
00105     str= strrchr(str, '.');
00106     if(!str) return CODEC_ID_NONE;
00107     str++;
00108 
00109     while (tags->id) {
00110         if (!strcasecmp(str, tags->str))
00111             return tags->id;
00112 
00113         tags++;
00114     }
00115     return CODEC_ID_NONE;
00116 }
00117 
00118 /* return -1 if no image found */
00119 static int find_image_range(int *pfirst_index, int *plast_index,
00120                             const char *path)
00121 {
00122     char buf[1024];
00123     int range, last_index, range1, first_index;
00124 
00125     /* find the first image */
00126     for(first_index = 0; first_index < 5; first_index++) {
00127         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
00128             *pfirst_index =
00129             *plast_index = 1;
00130             return 0;
00131         }
00132         if (url_exist(buf))
00133             break;
00134     }
00135     if (first_index == 5)
00136         goto fail;
00137 
00138     /* find the last image */
00139     last_index = first_index;
00140     for(;;) {
00141         range = 0;
00142         for(;;) {
00143             if (!range)
00144                 range1 = 1;
00145             else
00146                 range1 = 2 * range;
00147             if (av_get_frame_filename(buf, sizeof(buf), path,
00148                                       last_index + range1) < 0)
00149                 goto fail;
00150             if (!url_exist(buf))
00151                 break;
00152             range = range1;
00153             /* just in case... */
00154             if (range >= (1 << 30))
00155                 goto fail;
00156         }
00157         /* we are sure than image last_index + range exists */
00158         if (!range)
00159             break;
00160         last_index += range;
00161     }
00162     *pfirst_index = first_index;
00163     *plast_index = last_index;
00164     return 0;
00165  fail:
00166     return -1;
00167 }
00168 
00169 
00170 static int image_probe(AVProbeData *p)
00171 {
00172     if (p->filename && av_str2id(img_tags, p->filename)) {
00173         if (av_filename_number_test(p->filename))
00174             return AVPROBE_SCORE_MAX;
00175         else
00176             return AVPROBE_SCORE_MAX/2;
00177     }
00178     return 0;
00179 }
00180 
00181 enum CodecID av_guess_image2_codec(const char *filename){
00182     return av_str2id(img_tags, filename);
00183 }
00184 
00185 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
00186 {
00187     VideoData *s = s1->priv_data;
00188     int first_index, last_index;
00189     AVStream *st;
00190 
00191     s1->ctx_flags |= AVFMTCTX_NOHEADER;
00192 
00193     st = av_new_stream(s1, 0);
00194     if (!st) {
00195         return AVERROR(ENOMEM);
00196     }
00197 
00198     av_strlcpy(s->path, s1->filename, sizeof(s->path));
00199     s->img_number = 0;
00200     s->img_count = 0;
00201 
00202     /* find format */
00203     if (s1->iformat->flags & AVFMT_NOFILE)
00204         s->is_pipe = 0;
00205     else{
00206         s->is_pipe = 1;
00207         st->need_parsing = AVSTREAM_PARSE_FULL;
00208     }
00209 
00210     if (!ap->time_base.num) {
00211         av_set_pts_info(st, 60, 1, 25);
00212     } else {
00213         av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
00214     }
00215 
00216     if(ap->width && ap->height){
00217         st->codec->width = ap->width;
00218         st->codec->height= ap->height;
00219     }
00220 
00221     if (!s->is_pipe) {
00222         if (find_image_range(&first_index, &last_index, s->path) < 0)
00223             return AVERROR(EIO);
00224         s->img_first = first_index;
00225         s->img_last = last_index;
00226         s->img_number = first_index;
00227         /* compute duration */
00228         st->start_time = 0;
00229         st->duration = last_index - first_index + 1;
00230     }
00231 
00232     if(ap->video_codec_id){
00233         st->codec->codec_type = CODEC_TYPE_VIDEO;
00234         st->codec->codec_id = ap->video_codec_id;
00235     }else if(ap->audio_codec_id){
00236         st->codec->codec_type = CODEC_TYPE_AUDIO;
00237         st->codec->codec_id = ap->audio_codec_id;
00238     }else{
00239         st->codec->codec_type = CODEC_TYPE_VIDEO;
00240         st->codec->codec_id = av_str2id(img_tags, s->path);
00241     }
00242     if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
00243         st->codec->pix_fmt = ap->pix_fmt;
00244 
00245     return 0;
00246 }
00247 
00248 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
00249 {
00250     VideoData *s = s1->priv_data;
00251     char filename[1024];
00252     int i;
00253     int size[3]={0}, ret[3]={0};
00254     ByteIOContext *f[3];
00255     AVCodecContext *codec= s1->streams[0]->codec;
00256 
00257     if (!s->is_pipe) {
00258         /* loop over input */
00259         if (s1->loop_input && s->img_number > s->img_last) {
00260             s->img_number = s->img_first;
00261         }
00262         if (av_get_frame_filename(filename, sizeof(filename),
00263                                   s->path, s->img_number)<0 && s->img_number > 1)
00264             return AVERROR(EIO);
00265         for(i=0; i<3; i++){
00266             if (url_fopen(&f[i], filename, URL_RDONLY) < 0)
00267                 return AVERROR(EIO);
00268             size[i]= url_fsize(f[i]);
00269 
00270             if(codec->codec_id != CODEC_ID_RAWVIDEO)
00271                 break;
00272             filename[ strlen(filename) - 1 ]= 'U' + i;
00273         }
00274 
00275         if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
00276             infer_size(&codec->width, &codec->height, size[0]);
00277     } else {
00278         f[0] = s1->pb;
00279         if (url_feof(f[0]))
00280             return AVERROR(EIO);
00281         size[0]= 4096;
00282     }
00283 
00284     av_new_packet(pkt, size[0] + size[1] + size[2]);
00285     pkt->stream_index = 0;
00286     pkt->flags |= PKT_FLAG_KEY;
00287 
00288     pkt->size= 0;
00289     for(i=0; i<3; i++){
00290         if(size[i]){
00291             ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
00292             if (!s->is_pipe)
00293                 url_fclose(f[i]);
00294             if(ret[i]>0)
00295                 pkt->size += ret[i];
00296         }
00297     }
00298 
00299     if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
00300         av_free_packet(pkt);
00301         return AVERROR(EIO); /* signal EOF */
00302     } else {
00303         s->img_count++;
00304         s->img_number++;
00305         return 0;
00306     }
00307 }
00308 
00309 #if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
00310 /******************************************************/
00311 /* image output */
00312 
00313 static int img_write_header(AVFormatContext *s)
00314 {
00315     VideoData *img = s->priv_data;
00316 
00317     img->img_number = 1;
00318     av_strlcpy(img->path, s->filename, sizeof(img->path));
00319 
00320     /* find format */
00321     if (s->oformat->flags & AVFMT_NOFILE)
00322         img->is_pipe = 0;
00323     else
00324         img->is_pipe = 1;
00325 
00326     return 0;
00327 }
00328 
00329 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
00330 {
00331     VideoData *img = s->priv_data;
00332     ByteIOContext *pb[3];
00333     char filename[1024];
00334     AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
00335     int i;
00336 
00337     if (!img->is_pipe) {
00338         if (av_get_frame_filename(filename, sizeof(filename),
00339                                   img->path, img->img_number) < 0 && img->img_number>1)
00340             return AVERROR(EIO);
00341         for(i=0; i<3; i++){
00342             if (url_fopen(&pb[i], filename, URL_WRONLY) < 0)
00343                 return AVERROR(EIO);
00344 
00345             if(codec->codec_id != CODEC_ID_RAWVIDEO)
00346                 break;
00347             filename[ strlen(filename) - 1 ]= 'U' + i;
00348         }
00349     } else {
00350         pb[0] = s->pb;
00351     }
00352 
00353     if(codec->codec_id == CODEC_ID_RAWVIDEO){
00354         int ysize = codec->width * codec->height;
00355         put_buffer(pb[0], pkt->data        , ysize);
00356         put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
00357         put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
00358         put_flush_packet(pb[1]);
00359         put_flush_packet(pb[2]);
00360         url_fclose(pb[1]);
00361         url_fclose(pb[2]);
00362     }else{
00363         if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
00364             AVStream *st = s->streams[0];
00365             if(st->codec->extradata_size > 8 &&
00366                AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
00367                 if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
00368                     goto error;
00369                 put_be32(pb[0], 12);
00370                 put_tag (pb[0], "jP  ");
00371                 put_be32(pb[0], 0x0D0A870A); // signature
00372                 put_be32(pb[0], 20);
00373                 put_tag (pb[0], "ftyp");
00374                 put_tag (pb[0], "jp2 ");
00375                 put_be32(pb[0], 0);
00376                 put_tag (pb[0], "jp2 ");
00377                 put_buffer(pb[0], st->codec->extradata, st->codec->extradata_size);
00378             }else if(pkt->size < 8 ||
00379                      (!st->codec->extradata_size &&
00380                       AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
00381             error:
00382                 av_log(s, AV_LOG_ERROR, "malformated jpeg2000 codestream\n");
00383                 return -1;
00384             }
00385         }
00386         put_buffer(pb[0], pkt->data, pkt->size);
00387     }
00388     put_flush_packet(pb[0]);
00389     if (!img->is_pipe) {
00390         url_fclose(pb[0]);
00391     }
00392 
00393     img->img_number++;
00394     return 0;
00395 }
00396 
00397 #endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
00398 
00399 /* input */
00400 #if CONFIG_IMAGE2_DEMUXER
00401 AVInputFormat image2_demuxer = {
00402     "image2",
00403     NULL_IF_CONFIG_SMALL("image2 sequence"),
00404     sizeof(VideoData),
00405     image_probe,
00406     img_read_header,
00407     img_read_packet,
00408     NULL,
00409     NULL,
00410     NULL,
00411     AVFMT_NOFILE,
00412 };
00413 #endif
00414 #if CONFIG_IMAGE2PIPE_DEMUXER
00415 AVInputFormat image2pipe_demuxer = {
00416     "image2pipe",
00417     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
00418     sizeof(VideoData),
00419     NULL, /* no probe */
00420     img_read_header,
00421     img_read_packet,
00422 };
00423 #endif
00424 
00425 /* output */
00426 #if CONFIG_IMAGE2_MUXER
00427 AVOutputFormat image2_muxer = {
00428     "image2",
00429     NULL_IF_CONFIG_SMALL("image2 sequence"),
00430     "",
00431     "bmp,jpeg,jpg,ljpg,pam,pbm,pgm,pgmyuv,png,ppm,sgi,tif,tiff,jp2",
00432     sizeof(VideoData),
00433     CODEC_ID_NONE,
00434     CODEC_ID_MJPEG,
00435     img_write_header,
00436     img_write_packet,
00437     NULL,
00438     .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
00439 };
00440 #endif
00441 #if CONFIG_IMAGE2PIPE_MUXER
00442 AVOutputFormat image2pipe_muxer = {
00443     "image2pipe",
00444     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
00445     "",
00446     "",
00447     sizeof(VideoData),
00448     CODEC_ID_NONE,
00449     CODEC_ID_MJPEG,
00450     img_write_header,
00451     img_write_packet,
00452     .flags= AVFMT_NOTIMESTAMPS
00453 };
00454 #endif